Hello
I am using SDK v17 and sending the value of acceleration sensor to the app.
I want to use this value to process some action in the app. For example, if the transmitted acceleration sensor X axis has a value greater than 1.5, the app will output a notification.
(Firmware might be able to specify the sensor's range of values and send data to the app within a certain range. However, the requirements that I received are to send only the sensor value from the firmware and to be processed by the app.)
So I saved the sensor value in the float array and sent it to the app via nus_data_send.
//Send to App float value
float array_x2[20];
//uint16_t length = sizeof(array); //Problems occur because it prints out even empty spaces in the array.
sprintf(array_x2, "%.2f", accel_x); //Store values in array, float -> char
uint16_t length_x2 = strlen(array_x2); //length measurement of string
float array_y2[20];
sprintf(array_y2, "%.2f", accel_y); //Store values in array.
uint16_t length_y2 = strlen(array_y2); //length measurement of string
float array_z2[20];
sprintf(array_z2, "%.2f", accel_z); //Store values in array.
uint16_t length_z2 = strlen(array_z2); //length measurement of string
err_code = ble_nus_data_send(&m_nus, &array_x2, &length_x2, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&//
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
err_code = ble_nus_data_send(&m_nus, &array_y2, &length_y2, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&//
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
err_code = ble_nus_data_send(&m_nus, &array_z2, &length_z2, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&//
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
Can the app developer use this float value in the app?
Thank you in advance!
